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| en:documentation:tutorials:scratch [2020/02/10 15:58] – [cluster E5] ltaulell | en:documentation:tutorials:scratch [2021/11/18 15:20] – [Network topology of PSMN] ltaulell |
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| Two types of ''/scratch'' are available: | Two types of ''/scratch'' are available: |
| |
| <note warning> | |
| **Incomplete informations, because of new cluster (Lake)** | |
| </note> | |
| ===== Global scratch of a cluster ===== | ===== Global scratch of a cluster ===== |
| |
| |
| <note tip> | <note tip> |
| **Chimie et Bio scratches are already available** | **-At last-, ''/scratch/Lake'' is available** |
| </note> | </note> |
| |
| <code> | <code> |
| /scratch/ | /scratch/ |
| ├── Lake/ (yet to come, common to Lake cluster) | ├── Lake/ (common to Lake cluster) |
| ├── disk/ (local to some servers) | ├── disk/ (local to some servers) |
| ├── Chimie/ (reserved to chimie usage) | ├── Chimie/ (reserved to chimie usage) |
| </code> | </code> |
| |
| ==== cluster E5 ==== | ==== Cluster E5 ==== |
| |
| The ''/scratch/E5/'', common to ** E5-* ** queues is available for all [[documentation:clusters:hardware&#cluster_e5|cluster E5 nodes]]. | The ''/scratch/E5N/'', common to ** E5-* ** queues is available for all [[documentation:clusters:hardware&#cluster_e5|cluster E5 nodes]]. |
| |
| It contains ''/scratch/E5/e5-2670-gfs-scratch'', as a empty check file. | It contains ''/scratch/E5N/E5N-gfs-scratch'', as a empty check file. |
| |
| It is accessible from **[[documentation:clusters:services|cluster E5 front machines]]** | It is accessible from **[[documentation:clusters:services|cluster E5 front machines]]** |
| <code> | <code> |
| /scratch/ | /scratch/ |
| ├── E5/ (E5 scratch, common to E5 cluster) | ├── E5N/ (E5 scratch, common to E5 cluster) |
| ├── nvme/ (local to some servers) | ├── nvme/ (local to some servers) |
| ├── ssd/ (local to some servers) | ├── ssd/ (local to some servers) |
| |
| </code> | </code> |
| ==== cluster X5 ==== | ==== Cluster X5 ==== |
| | |
| | The ''/scratch/X5/'', common to ** X5-* ** queues is available for all [[documentation:clusters:hardware&#cluster_x55_x56|cluster x55/x56 nodes]]. |
| | |
| | It contains ''/scratch/X5/x5570-gfs-scratch'', as a empty check file. |
| | |
| | It is accessible from **[[documentation:clusters:services|cluster x55/x56 front machines]]** |
| | |
| | <code> |
| | /scratch/ |
| | └── X5/ (X5 scratch, common to X5 cluster) |
| | </code> |
| | |
| | |
| | ==== Scratch local to some nodes ==== |
| | |
| | Some local ''/scratch'' are available only on some nodes. [[documentation:clusters:hardware|See detailled description]] or ask staff. |
| | |
| | |
| | ==== Network topology of PSMN ==== |
| |
| \\ | \\ |
| The diagram below represents the integration of these two ''/ scratch'' spaces in the PSMN infrastructure. | The diagram below represents the integration of these ''/scratch'' spaces in the PSMN infrastructure. |
| \\ | \\ |
| |
| {{ :documentation:tutorials:psmn_network_synoptic.png?direct&660 |}} | {{ :documentation:tutorials:psmn_network_synoptic_a3_2021.png?direct&660 |}} |
| |
| <hidden> | |
| {{ :documentation:tutorials:psmn-network-synoptic.png?direct&640 |}} | |
| </hidden> | |
| \\ | \\ |
| |
| ===== Using the /scratch: manual copy ===== | ===== Using the /scratch: manual copy ===== |
| |
| For the global ''/scratch'', before submitting your job, copy your inputs into a folder on the ''/scratch'' (//ie// ''/scratch/login/whatever/''). | For global ''/scratch'', before submitting your job, copy your inputs into a folder on the ''/scratch/'' (//ie// ''/scratch/<cluster>/<login>/whatever/''). |
| The simplest is to reproduce the same hierarchy of folders and files by changing '' /home'' by ''/scratch'' (copy with '' cp -r ''). | |
| | The simplest is to reproduce the same hierarchy of folders and files by changing '' /home'' by ''/scratch/<cluster>''. |
| |
| Do not forget to modify your submitting files consequently. | Do not forget to modify your submitting files consequently. |
| ===== Using the /scratch : automatic copy ===== | ===== Using the /scratch : automatic copy ===== |
| |
| For local ''/scratch'' you don't know which node will be assigned to your job, it is also valid for the global scratch, but less annoying). Thus, You cannot copy your data to a particular node in advance. You must integrate the copy ''/scratch'' <-> ''/home'' in the submitted script. | For local ''/scratch'' you don't know which node will be assigned to your job (it is also valid for the global scratch, but less annoying). Thus, You cannot copy your data to a particular node in advance. You must integrate the copy ''/scratch'' <-> ''/home'' in the submitted script. |
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